Beginning in middle age and continuing through later adulthood, individuals are often motivated by events in their own lives or the lives of significant others to obtain health-related information.^^ Health-related concerns draw many adults into a new domain of science learning. At the same time, with retirement, older adults have more time to devote to personal interests. Their science learnmg addresses long-standing scientific interests as well as new areas of interest.^^
Adults differ fr...

In the earliest days of research, memory
was thought to be populated with socalled
engrams, memory traces that were
localized in specific parts of the brain. To
locate one such engram—for the memory
of a maze—psychologist Karl Lashley
taught rats to run through a labyrinth. He
then cut out various parts of their brain
tissue and put them right back into the
maze. Though the rats’ motor function
declined and some had to hobble or crawl
their way woozily through the twists and
turns, the ...